Transformer-regulator.



PA'IENTED JUNE 9, 1908.

W. H. THOMPSON. TRANSFORMER REGULATOR.

APPLICATION FILED JUNE 25-. 1906- 'INVENTOR c R X HMMHII II IIIII I OWITNESSES AIIO'RN STA ES E 1 OFFICE T YWILBUR H. 1HoMPsoN, vorWILKINSBURG, PENNSYLVANIA, ASSIGNOR 'ro WESTINGHOUSE ELECT-R10 aMANUFAOTURING GOMPANY, A CORPORATION or PENNS LVANIA;

rnausronmnn-nncutaroa.

' essa e,

"3T0 all who'r r z it I v Be'it' known that-,1, WILBUR.H.--THOMP- son, acitizeiilof the UI l-itgd States, and a V ,resldent of-Wilkinsburg, inthe county of Al- 1 legheny and" State of Pennsylvania, have in-.

- vented a new and usefullm rovement in Transformer-Regulators, of w'ich the fol-- [lowing is-a specification;

1 4 My Invention relates to alternating cur-- rent transformers whichare adapted to regul .electromotive forces or the currents in thecircuits in which they are connected;

The object'ofmy-invention is to provide a simple and durable regulatingtransformer that shall automatically maintain a constant currentin thecircuit in which it is connected and'that shalljcomprise a coilarrangement and a magnetlzable core structure of such I characterthat-the secondary coils will be so '20 separated from theprimarycoilsas to avoid the primary magnetic flux under short-airs cuitor. other abnormal conditions.

i A constant current regulating transformer, such as is employed inanare light circuit or in similar relations usually comprises a stationarycore member having relatively movable coils, at least one of which ismovable drical core member upon which movable: coils are mounted in pars, at the extremities of radial arms which are so movabl. mounted thattheir axis of'rotation coincldes with I the axis of the 'cylinder. Thecylindrical core member .is supported at diametrically .opposite sidesand means are'provide'd for normally holding adjacent-coils located beetween the points of support close together, so

that'the 0011s are permitted to -rotate through an angle ofsubstantially 90. When the l coils are 'in their normal positions,themagnetic flux induced in the core by the primary winding,whichcomprisesfa pair of diametrically sopposite cois, passes through theother pair of coils. If a short-circuit occurs or the current isabnormally increased for any-reason, the two'scts of coilsare se arated,

5 by reason of the. increased repelling orce ex- 1 Specification ofLetters Patent. A Application m d June 2 15, 1909.- Serial no. 323,306.

involved in providing a mechanicalarrange' erted between them, and movefrom,a position substantially midway betweenijathe points of support toa posit-ioncloseto the supports, in which substantially ally the fluxinduced by theprimarycoilsreturns through leakage paths without passingthrough the secondary coils. 45 i -13 My-inventionnis illustrated inthe, accom-r panyi'ng drawings, infwhich v t a Figure leis an endelevation of a;regulator constructed in accordance; therewith, and Fi 2is a view, partially in planjandparilaria ly in section, of the;regulator shown -in 1g.1. Referrin to the drawings, the transformerregulator il ustrated, comprises a pair .of concentric hollowcylindrical core members 1- and. v2, a base 3 and a pluralityofmovablecoil'se, p 5, ,6 and 7. Coils 4 and 5.:ares1'1pportedatopposite sides of a shaft Sbybearings and ,IO-Which areprovidedwithEprojectingarms 11 to which coil clamps 12 are attached.Thecenter line of the shaft 8 c0 incides With the axis of the cylinder 1and is rotatably mounted in'stationary bearings 13 and 14. Bearings 15and 16, which correspond toathe bearings--v 9 and 10, are keyed to theshaft-8andsupfport the coils. 6 and 7. The coils 4 and-7 mayflconstitutethe primary and coils 5 and 6 the secondary windingwofethe trans rmerregulator; The core members 1 and 2 areimaint'ainedr r in a constantrelative position; and'are su +4 ported from the base 3by a'clampingframe: 17 comprising cross stripslS which1aref-as= tened together bylongitudinal bolts-19$ in .this Way, a free rotation of'thescoilsfisaper mitted through an angle ofsubstantiallyQO The bearing 9is provided with a sheave or ulley 20 and another similar pulley 21' isiieyed to the shaft 8. Thecoils 4 and 6, and 5 and 7 are normal] heldclose together i'n-aposition substantialy midway between. the crossstrips 18 by'means ofa weight 2-2 which is suspended from cables orchains that are coiled in opposite directions about the pulleys: 20 and2 1 and are attached thereto. The tendency of the coils 'to repel each.other 1s thus overcome, under normal conditions, by the weight, thecoils themselves being statically balanced but when the current in thesecondary circuit exceeds a predetermined amount the repelling forceexceeds the force exer ed b the Weight and the'coils 4 and 6 and an 7are respectively separated from together, substantiallv all of themagnetic each other by a distance which is dependent upon the currenttraversing the secondary circuit. When the two sets of coils are closeflux induced by one of the coils passes through the adjacent'secondarycoil, but as the two. coils are separated only a small part of the fluxtends to pass through the secondary= tia lly constant value.

. and equal forces tending to effect rotation.

bination with a stationary hollow cylindrical 5 Variations in thearrangement of details i may be effected within the scope of my in- 5'ention.

I claim as my invention:

1. In a. regulating transformer, the comand. magnetizable core, of aplurality of symmetrically disposed coils which aremounted to revolvearound the axis of the corlri, and each of which surrounds the core wa2. In a regulating transformer, the combination with a hollowcylindrical core member, of a shaft the'center line of whichsubstantially coincides with the axis of the cylinder, and pairs ofcoils which surround the core wall and are supported by the shaft.

3. In a regulating transformer, the comi bination with a hollowcylindrical core memher, a shaft the axis of which substantiallycoincides with the axis of the cylinder, and pairs of coils whichsurround the core wall, of means for rotatably mounting the coils uponthe shaft.

4. In a regulating transformer, the conibination with a pair ofconcentric, magnetizable cylinders, and a sup orting base therefor, oftwo pairs of coilsw 1ich longitudinally surround the inner magnetizablecylinder; wall and are mounted to revolve about its axis.-

5. In a regulafjngtransformer; the com-- I bination with ders and aaxis, of coils m vaunted at their common I which. loi'igitudinallyencircle ssaesa;

:ncerttric magnetizable cylin i the inner cylindrical core, wall and aremounted to revolve around the shaft.

6. Ina regulating transformer, the combination with a pair of concentricmagnetizable cylinders, supporting means therefor, and a. shaft thecenter line of whichcoincides with the common axis of the cylinders, oftwo pairs of coils that constitute primary and secondary transformerwindings and longitudinally surround the inner cylinder wall,- andmeans-for supporting the coils for revolution around the core axis; K

i 7. In a regulating transformer, the combination with apair ofconcentric magnetizable cylinders, and a. shaft mounted at their commonaxis, of two pairs of coils that longitudinally surround the innercylinder wall and project in substantially radial planes from the shaft,and means for exerting a force which tends to keep the correspondingcoils of the two pairs together.

8. In a regulating transformer, the combination with ahollowcylindricalc'oil member, supports attached'thereto atdiametrically opposite sides, and ashaft mountedto coincide with theaxisof the cylinder,"of two.

pairs of coils that longitudinally surround the core Wall, and aremounted on the shaft, and means for exerting a force which tends to keethe correspondingcoils of the two pairs 0 ose together and at a pointSUbStBJI-n tially midway between said supports.

9. Ina regulating transformer, the.com bination with concentricmagnetizable cylinders, a. supporting base therefor which engages them'ner cylinder only at diametrically o posite points, and a shaft thecenter subscribed my name this 20th day of June,

, line o which. coincides with theicommon axis of the cylinders, of twopairs of coils which,

